Casing of a transport refrigeration unit



FIG. 1 is a front elevation view of the refrigeration unit casing;

FIG. 2 is a left side elevation view of FIG. 1;

FIG. 3 is a right side elevation view of FIG. 1;

FIG. 4 is a top plan view of FIG. 1; and,

FIG. 5 is a bottom plan view of FIG. 1.

In the drawings, the broken lines shown in the Figures depict environmental subject matter only and form no part of the claimed design. 

The ornamental design for a casing of a transport refrigeration unit, as shown and described. 